Cooling system for passenger vehicles



- Sept. 26, 1933. c. F. HALL I 1,928,375

COOLING SYSTEM FOR PASSENGER VEHICLES Filed Oct. 6', 1930 4 Sheets-Sheet l Sept. 26, 1933. c. F. HALL 1,928,375

COOLING SYSTEM FOR PASSENGER VEHICLES Filed 001:. 6 1930 4 Sheets-Sheet 2 w 0 l Z [,1 m 1111;. l

I, x a 1 n 52 5 w c. HALL COOLING SYSTEM FOR PASSENGER VEHICLES Sept. 26,, 1933.

4 Sheets-Sheet 3 Filed Oct. 6, 1930 Sept. 26, 1933. c. F. HALL I COOLING SYSTEM FOR PASSENGER VEHICLES Filed Oct. 6, 1930 4 Sheets-Sheet 4 Patented Sept. 26, 1933 UNITED STATES COOLING SYSTEM FOR PASSENGER VEHICLES Carter F. Hall,

Baltimore, Md.

Application October 6, 1930. Serial No. 486,784

21 Claims.

This application is in part a continuation of my earlier applications:

Reissue patent No. 17,019, dated July 3, 1928;

Application Serial No. 301,187, filed Aug. 22,

1928; and Patent No. 1,781,151, dated Nov. 11,

This application relates back for common subject matter to the prior filed cases and I claim all rights obtained thereby.

The present invention relates to a cooling system for railway cars and the like, whereby the process of mechanical refrigeration is applied most efficiently in cooling the atmosphere of the car and whereby in connection therewith or independently a continuous supply of cold water uncontaminated by contact with ice arid colder than can be obtained by the use of ice is maintained. An air cooling chamber is designed to permit either the dry or wet cooling system to be used, provision being made so that the air can be drawn into a cooling chamber and passed over the surface of an evaporator, cooling the air and forcing it through air ducts having perforations leading into the vehicle. Provision also is made for using the condensation for either cleaning or cooling purposes by allowing the liquid to come into contact with the air, cleaning and cooling the same and then forcing the air through an air conveying system, allow- 00 ance being made for an excess liquid to be discharged. Provision is also made in the cooling compartment for the introduction of any refrigerant such as ice to be used, and is so designed that the air to be cooled can be drawn into the cooling compartment and passed either over the cooling surface of the ice, or by liquid caused by the melting of the ice, cooling and cleaning the air and then forcing the air by pressure through an air conveying system.

Provision is also made for the cooling of the air in the upper section of the vehicle by air coming in contact with pipes connecting with a cooling element in the compartment containing liquid and said pipes extending to and in the upper section of the vehicle.

To provide the electrical energy required for the cooling equipment, a generator is driven by the axle of the car; in addition, the electrical equipment necessary to obtain a constant voltage above a certain speed is provided, including the necessary electrical control. In the accompanying drawings I have illustrated a cooling apparatus embodying the features of my invention in the preferred form and also showing certain modifications thereof.

In the drawings:

Figure 1 is a front elevation of a stand or casing, enclosing the compressor condenser coll, water cooling compartment and other elements and details of the apparatus. 80

Figure 2 is a similar view of a modified form of stand or casing inclosing the condenser and used for reheating the cooled air providing a regenerative system.

Figure 3 is a detail of one end of the contact air cooling conduit.

Fig. 4 is a front elevation of the cabinet at the top of the stand, Figure 1, with the cover of the cabinet removed.

Figure 5 is an enlarged detail of the cold air supply cooling conduit.

Figure 6 is an elevation of a water cooling stand corresponding to Figures 1, 2 and 4, the front cover being partially removed to show the details;

Figure '7 is an elevation of a railway car of the passenger carrying type equipped with the cooling system of the invention which is shown more or less diagrammatically.

Figure 8 is an enlarged section on the line 8-8 of Figure '7.

Figure 9 is a detail section of the spiral conduit at the inlet end, i. e., where the refrigerant is introduced. a

Figure 10 is a detail section of the air, and electrical system.

Referring to the drawings by numerals, each of which is used to indicate the same or similar parts in the different figures, the illustration, particularly Figures 1 and 4, shows an upright casing or hollow pedestal 1, upon which is supported a cooling compartment 2, enclosing the water cooling container shown in the form of a water pipe 3, referred to herein as a stand pipe of comparatively large diameter, 'the extreme 9 lower end portion of which pipe at 4 forms a tank for cold water to which the cooling effect of the apparatus is directly applied. This pipe 3 in the form of the invention shown is supplied with water from a tank 5 carried by the coach in any convenient location, compressed air and gravity feed forcing the water to points where needed, in this case it being supported in' the top of the car 23, from which the pipe 3 depends, extending downwardly into the compartment 2 as already described.

The pedestal or upright casing 1, in the preferred form of the invention, encloses a condenser coil 6, shown at the bottom in Figure I" 1. This is for cooling the compressed refrigerant,

preferred refrigerant may be used. This coil is supplied with compressed refrigerant from the compressor 8 driven by any suitable motor, the coil being cooled in any suitable manner. as by means of a draft of air entering in the preferred form, Figure 1, at the bottom from beneath the car through the floor- 9 by way of an opening 10 registering with the bottom of the casing 1, the air being led upwardly by a slight vacuum which may be created by connecting the casing 1 by means of a pipe 11 connected to the casing above the compressor with one of the ventilators 12 at the top of the car, or the draft may be created in any suitable manner. It will be easily understood that the casing 1 acts as an air passage and that when the car is in motion the air is sucked out at the ventilators creating a draft through the coil by way of pipe 11. The portion of the system containing the refrigerant is thus hermetically sealed and separated from the interior of the car, avoiding any possibility that in case of accident or from any other cause, the refrigerant, which is considered harmful, may not escape into the passengers compartment. In case of leakage, the vapor is carried outside with the cooling air.

Referring now to Figures 1, 4 and '7, the refrigerant which is compressed by the compressor 8 and cooled in the coil 6, is led upwardly from coil 6 by a pipe 14 through the reducing valve 13 to a coil 15, which is shown as inside the water cooling compartment 2 and preferably encircles a brine or holdover tank 16 which, in turn, encloses the lower portion 4 of the cold water pipe which is chilled in a manner to be described furnishing cold water for drinking. This coil 15 is preferably of the helical conduit construction illustrated in detail in Figures 5 and 9, consisting of an outer tubular cylindrical casing 17, a helical shell 18 enclosed within the casing 17 and in contact or nearly in contact therewith providing a helical passage 19 immediately within the casing 17, through its periphery, which, in this instance, is utilized for the refrigerant which is introduced directly thereinto from the pipe 14 by way of the fitting 20.

This specially constructed coil 15 in the preferred form also includes a central tubular member 21, within the helical shell 18. While it may be omitted or otherwise utilized in the present instance, this member 21 also contains a refrigerant introduced therein from the pipe 14 by way of the fitting 22, which is connected to it, and the helical shell 18 forms between it and the central tubular member 21 a helical or a similar corrugated passage 24, which is enclosed between the central tubular member 21 described as for carrying the refrigerant and the helical conduit or passage 19 on the outside, also described as carrying the refrigerant, though any of these passages may be otherwise utilized.

The coil 15 is connected at its lower end by fittings 25 and 26 to be described, or in any suitable manner to an air pipe 2'7, see also Figure '7, which as shown preferably leads along the floor of the car distributing cooled air through a series of pipe connections although it may be located within the car in any suitable manner, this pipe being shown as perforated at 28, though the perforations are not regarded as an essential feature.

The coil 15, as already described, extends upwardly about thebrine tank 15 and terminates at the top. as best illustrated in Figure 5 in the inlet air pipe 28, whereby air is introduced e t er which is preferably sulphur dioxide though any by a fan, suction or pressure from any suitable source as outside the car. At the top the outer helical conduit 19 containing refrigerant is connected by a fitting 30 to a cross or four way fitting 31 and the inner central tubular member 21 is likewise connected thereto by a fitting 32, the return pipe 34 for the refrigerant from the cooling pipe 33 at the top of the car being likewise connected to said cross fitting 31 by a fitting 35. The remaining connection of said cross fitting 31 is connected by a fitting 36 to a cooling coil 3'7 within the brine tank 16 and surrounding the standpipe 4 for the cooling water which coil 16 leads the refrigerant to a return pipe 38, which is connected to the suction of the compressor. In this connection it will be understood that brine is used as designating any nonfreezing liquid or solution.

As a means for supplying air, the inlet air pipe 28 to the air cooling coil 15 is connected to the ventilator '12 and provided with a blower or air pump 40, driven by a suitable electric motor, this equipment being diagrammatically indicated in Figure '7. The air from the cooling coil 16 is released from the perforated pipe 27 along the bottom of the car or in any convenient location, perforations 28 being merely illustrative.

To provide further cooling of the atmosphere of the car, refrigerant is led from the pipe 14 by way of a pipe 41 upwardly to the top of the car, being there introduced into any suitable cooling passage, as the outside helical passage 42 of a conduit 43 which may be constructed somewhat after the manner of the conduit 15, the outer casing 1'7 being preferably omitted. This pipe has an inner conduit 44 which may be used for brine, which begins at the center of the car, being plugged at this point as indicated at 45. This brine pipe is also known as a holdover pipe in that it retains the cooling effect after the refrigerant has been released, drawn off or become inactive for any reason.

The refrigerant from the pipe 41 is introduced into the helical passage 42 of the combined conduit 43 in the form of the invention shown at the top center of the car, although this location is not essential, by way of a reducing valve 46 shown at this point, the refrigerant flows in contact with the brine for the full length of the pipe which as shown is half the car length. The return pipe 34 of the coil pipe 33 is connected at the end opposite to the point where the refrigerant is introduced from the reducing valve 46, by way of the fitting 35 to the cross or four way fitting 31. In this fitting the refrigerant from the three passages in the air cooling coil 15 and from the overhead cooling pipe 33 is combined in the water cooling coil 37 already described.

In the form of the invention shown, particularly in Figure 4, provision is made for utilizing the inside of the cooler casing 2, aside from what is occupied by the coils and the water cooler to hold air washing water for cleaning the air introduced by way of the coil 15. To this end the fitting 25 already referred to is shown in the form of a nonreturn valve to prevent the en trance of water into the air passage of the coil and the fitting 36 is provided in the form of a three way valve which may be turned so as to prevent the cooled air from the coil 15 from passing directly to the pipe 2'7 and so as to discharge this air from the coil 15 into the wash water indicated by reference character 43. The air thus introduced into the wash water passes upwardly into the air space 47, and hence by way of the bypass 48 back to the pipe 27 at a point beyond the three way valve 26 whence it passes to the perforated portion of the pipe 27 shown in Figure 7. The bypass 48 is also shown as provided with a three way valve 49 above the compartment 2 and an upwardly disposed open elbow 50 connected to the three way valve so that by turning the valve 49 the elbow 50 may be connected to the compartment end 51 of the bypass 48, whereby the elbow 50 may be utilized for introducing water into the compartment.

As will be noted in Figure 7, it is proposed to provide a construction corresponding to that shown in Figures 1 and 4 at each end of the car, the cooling pipes 33 and 27 being in two parts or separate units connected to the respective cooling apparatus at the respective ends of the car so that there are two reducing valves 46 at the center and two pipes 27 and 33 extending from each end toward the center, though this arrangement is not essential to the operation of the invention.

Figure 6 shows a'water cooling compartment 55 adapted to cooperate with a casing or pedestal 1, as shown in Figure 1, or any suitable pedestal as that shown in Figure 2 to be later described. This compartment is connected to the condenser coil 6 by a pipe 54 and to the compressor by a return pipe 58. This condenser pipe 54 is provided with a pressure reducing valve 56 from which the expanded refrigerant is led directly to a water cooling coil 56 or any suitable means to bring the refrigerant into heat exchanging relation with the water. As shown, the coil 57 encircles the water standpipe 59, being connected at its lower end to the return pipe 58, it being understood that this cooler may be combined in any suitable manner, for example, as shown in Figure 7, with'any or all of the air cooling features therein disclosed. This compartment is shown as containing a brine tank in which the coil 57 is immersed, the brine tank in turn surrounding a cold water tank 59. This compartment 55 is further shown as intended to be utilized as an emergency ice chamber to supply the cooled drinking water in case of failure of the refrigerator system for any reason. In this form of the invention, instead of the standpipe 3 being integral and continuous with the cold water tank 4, as shown in Figure 4, there is a separate cold water tank 59 connected to the standpipe 3 by water connection 85 which, in the form of the invention shown, serves as a cooling coil, it being understood that in the form illustrated the tank 59 is located inside the refrigerator coil 57 and immersed in the brine in the tank 60. This connection 85 as shown extends downwardly from the standpipe 3 through the brine in the tank 60 and is coiled about the tank 59, the coil also being immersed in the brine and extending'upwardly. As shown, the upper portion of this water coil 86 is wound about the upper part of the refrigerator coil 57 at 87, the arrangement being preferably of the type shown in Figure 3. This portion of the coil 87, which is wound about the refrigerator coil as shown, is then connected at 88 to the top of the cold water tank 59. It will be understood that in the operation of this form of the invention, the water passing from the pipe 3 to the tank 59 is cooled immediately, the chilled -water entering the tank, by its greater specific refrigerator system is first connected up at the time the train is started is overcome and cold water is made instantaneously available.

To overcome the possible objection to the use of mechanical refrigeration in passenger cars on account of the chance that the refrigerant may escape in case of accident, and have a harmful effect on the passengers, the apparatus is shown as provided in each instance in the water cooling compartments 2 and 55, and also in the casing 1 containing the compressor and condenser coil 6, with a fragile or frangible container 62, which may contain an antidote for the refrigerant. Where S02 is used as a refrigerant, the bottle may contain ammonia and where ammonia is used as a refrigerant the bottle may contain any suitable acid, volatile or otherwise. This container is normally sealed and is carefully designed of just the right resistance to shock, so that it is broken and the contents released when and normally only when the refrigerating system is punctured.

In Figure 8, which'is a section on the line 88 of Figure 7, the overhead cooling pipes 33 are shown as supported over a trough 63 to catch the condensed moisture and prevent dripping, and in each instance the water cooler is shown as provided with a water pipe 64 leading from the standpipe 4 or 59 to a spigot 65 arranged in a suitable niche 66 in the compartment cover 67. In Figure 1 there is an aperture 68 for the introduction of used cups which pass downwardly through a pipe 69 to a suitable receptacle not shown and reference character 70 indicates a suitable container for new cups. 7 Figure 2 shows a slightly modified construction of pedestal which is slightly raised from the floor and the floor 9 being closed beneath the pedestal, and air openings 72 being provided at the bottom above the floor. This pedestal is shown as provided with air discharge openings 73 at the top, the air being circulated in any suitable manner,

the heat of the condenser coil being regarded as ordinarily sufficient to maintain the circulation. The operation of the apparatus has been quite fully discussed in connection with the descrip:

tion of the structure. The manner of compressing the refrigerant in the compressor 8 and passing it into the condenser coil 6, where it is cooled and condensed and from whence-it is released through a suitable pressure reducing valve 13, flowing in the form of the invention shown in Figures 1 and 5, through the coil 15 surrounding the brine tank 16, going by way of the outer helical passage 19 and the central tubular member 21, tothe fitting 31 whence it is returned through the coil 37 which surrounds the cooling water container 4, within the brine tank 16, the coil 37 being immersed in-the brine, as has been explained; The drinkingwater is cooled by the coil 37, the cold air supply being passed through the passage 24 of the coil 15 between the inner and outer streams or refrigerant. In this way chilled Water is supplied to the cold water spigot 65 and chilled or cold air to the perforated pipe 27 in the car, the air to be thus cooled and released being propelled in any suitable manner as by means of a blower or pump 40 drawing air from the ventilator. It will be understood that the fitting 36 combines the return refrigerant from the contact cooling pipe 33 and from the inside and outside passages of the coil 15, the refrigerant from all three sources being passed through the coil 37 surrounding the cooling water container 4 as described. The arrangement of coils 15 and 33 is particularly advantageous in that it tends to conserve the refrigerating efiect and apply the surplus left from cooling the air to the drinking water. The refrigerant is also carried by the pipe 41 to the contact cooling conduit 33 which is shown in the top of the car, the passage for refrigerant being preferably in a helical form surrounding the central pipe '44 which in this instance is a holdover or brine pipe, the entire conduit 33 serving to cool the air in the car by contact.

The manner of bypassing the cold air supply to be released within the car by way of the three way valve 26 through the washing water 43 and hence back to the air release pipe'2'l by way of pipe 48 and three way valve 49, has been fully described, as has also the manner of admitting water by way of the elbow 50 through the three way valve 49.

The manner of supplying air to the condenser coil by drawing it through the floor of the car and discharging it at the ventilator or by means of suction supplied in any suitable manner has also been fully discussed, as has also the alternative method of drawing air from the floor of the car or from any suitable source, and permitting it to circulate around the coil and through the casing, being released by the ventilating openings '73 as shown in the modified form, Figure 2.

Figure 1 illustrates a cover 67 adapted to be opened and closed in order'to supply ice to be used in case of emergency.

Figure 6 illustrates a water cooler which is like that shown in Figure 4, except that the compartment 55 corresponding to the compartment 2, is used for ice cooling in an emergency and for air washing water, and this water cooler is connected to the air cooling and cool air supplying elements described particularly in connection with Figures 1, 4 and '7.

The above refrigerating apparatus as described is in combination with a water raising system, and an electric system, deriving the energy through an axle driven generator 114, and storage batteries 100 which is illustrated in Fig. 10. An air compressor 118, produces the air pressure communicating with an auxiliary liquid container 97 supplying liquid to the cooling compartment.

This air pressure works a governor 94, maintaining an air pressure in the air reservoir tanks 95 and 92 through a feed valve 119 which controls the air pressure in the reservoir tank and maintains a predetermined range of air pressure in the liquid container 97, for operation of the water raising system. Air reservoirs 92 and 95 communicate with the water raising system through pipe connection maintaining a supply of air for the water raising system when the air compressor is inactive. A governor 94, that is set at a predetermined range of pressure before operating, permits the air above a predetermined range of pressure to pass through and communicate with theair storage chambers 92 and 95 which communicate through a non-returnable check valve 96 to the water tank 97, the water tank being in communication with the cooling compartment.

The electric system comprising part of this refrigeration system includes an axle driven generator 114 supplying current through the following named electrical units, a regulating coil 120, a set of storage batteries 100, field resistance 121, an electric compressor 103, a main switch 106, a lifting coil 107 for main switch 106, main fuses 110, field fuses 112, and an automatic control system 113.

The electrical compressor 103 is in communication with the refrigerator unit which is in combination with the liquid and air cooling means.

Figures 2 and 10 of the drawings show a modified form of the condensing unit showing a condenser being cooled by either water or air which is best suitable as conditions require, connections being provided for the cooling water to circulate around the condenser through a multiple tubing, one of which carries the refrigerant, the other carrying the cooling water and being surrounded by a holdover of non-freezing liquid, as shown in Figures 2 and 10 of the drawings. The pipe 115 carries the refrigerant, pipe 116 carries the cooling water and 117 designates the holdover of non-freezing liquid.

I have thus described specifically and in detail a water and air cooling apparatus for railway cars and the like, the description being specific and in detail in order that the manner of constructing, operating and using the apparatus may be fully understood. However, the terms herein are used descriptively rather than in a limiting sense, the scope of the invention being defined in the claims.

What I claim as new and useful is:

1. A device for cooling drinking water and air for passenger vehicles, including a cooling compartment holding a body of liquid, an evaporator within the compartment, a container for the drinking water associated with the evaporator, an auxiliary liquid container communicating with the cooling compartment a fan and air conveying steam communicating with the cooling compartment having means for passing air therethrough to cool said air, and means to clean and condition said air, and thence into the interior of the vehicle.

2. In a device for cooling air for passenger vehicles, including air conditioning, and cooling means, and means for distributing air, a liquid supplying system for furnishing liquid to the air conditioning and cooling means, said liquid supply system having a predetermined air pressure means for the circulation of said liquid.

3. A system for cooling and supplying drinking water and for reducing the temperature of water within a cooling compartment adapted to receive ice or other refrigerants, the system having air cooling and cleaning means and having control means for the saturation of the air and a liquid supply system communicating with the cooling compartment, with means for delivering the air to an enclosure to be ventilated, and means for cooling and supplying drinking water.

4. In combination, a water cooling, and an air conditioning device for passenger vehicles having means for cooling and conditioning the air by the use of ice, means for supplying drinking water said means being cooled by ice, and means for distributing and circulating the air in the vehicle, with means for supplying liquid to the air conditioning means.

5. The combination in a water cooling system mounted on a casing having liquid cooling means comprising an evaporator, a condenser having liquid cooling mean and a compressor enclosed in a casing, having an outer casing forming a chamber adapted to hold aliquid and containing two spiral passages surrounding the compressor casing, one of the spiral passages having liquid circulating means, the other spiral passage hav- Kil ing connecting means for connecting with the compressor and evaporator which surrounds a closed liquid container, a spiral passage for liquid in heat exchanging relation with said evaporator and connected to a closed liquid reseruoir with means for supplying liquid to the spire passage and liquid reservoir.

6. In combination an air cleaning and cooling system, and a refrigerating apparatus for passenger vehicles, including means for cooling and supplying drinking water, the system having means for circulating a refrigerant, an air cooling means in the vehicle, a surface cooler receiving refrigerant from said means and means for guiding the circulation and recirculation of air over the surface cooler and means for drawing fresh air through an air inlet to be cooled and into the space occupied by passengers, means associated with the refrigerating system for cooling drinking water, the system having a liquid supply means.

7. In an air cooling, cleaning, and ventilating system for passenger vehicles, having means to cool and supply drinking water, a cooling chamher, a brine container therein, an air cooling means Within the upper portion of the space within the vehicle and communicating with the cooling means of the cooling chamber, conduits communicating with the lower space within the vehicle having air circulating means and attached to the air cooling means, a mechanical refrigerating system for cooling the brine, means for controlling the refrigerating system, a blower having a fresh air intake having control means and valved conduits for directing air from the pressure side of said blower for driving air to the cooling means and into the vehicle and means for cooling and supplying drinking Water said cooling means being associated with the refrigeration system; and means of supplying liquid to the air cooling means.

8. In combination an air cleaning and air cooling system for passenger vehicles having means of precooling and cooling the air, a cooling means adapted to hold refrigerants and liquid, having liquid cooling means; a fresh air intake and blower having control means for the system, an air cooling means in the vehicle located above the space occupied by passengers, pipes connected with the air cooling means and with the cooling compartment having circulating means, means for the circulation of air over the air cooling means and means for supplying liquid to the cooling means.

9. In a cooling, ventilating, air circulating, and a drinking water cooling and supply system for railway cars, air circulating conduits included in the circuit of space within the passenger compartment of the car, a blower in the circuit, a refrigerating means enclosed in a cooling compartment and valved means in the circuit for diverting the air flow in contact with the refrigerating means, and upwardly through the compartment, an air inlet outside the car to the suction side of the blower and means for controlling the percentage of air through the cooling means and means associated with the refrigeration system for cooling and supplying drinking water with means of supplying liquid to the system.

10. In a system of conditioning air and continually cooling it for passenger vehicles having means to cool and means to condition the air, and having substantially equal air circulating means in the sphere of the space occupied by passengers, with means carried by the vehicle of supplying liquid for the air conditioning means and means for by-passing air around the air conditioning means into the vehicle.

11. In an air cleaning and cooling system, having means to cool and supply drinking water for passenger vehicles, a refrigerating apparatus, a cooling compartment, means to circulate a refrigerant, an air cooling means in the compartment receiving refrigerant from the refrigerating apparatus, the compartment having an air inlet in its lower section communicating with the exterior of the vehicle, an air outlet 'at one end of said compartment and in communication with said inlet in the lower section of the compartment, an air outlet at the opposite end of the compartment, a conduit communicating with the said compartment and outlet of the compartment for conducting the air that has come from the inlet at one end of the compartment, and means for forcing air through said inlet, means for cooling the air and means for forcing the air through said outlet into the vehicle and means associated with the refrigerating apparatus for cooling and supplying drinking water and means for supplying liquid to the system.

12. In a system for cooling air and cleaning it, comprising air cooling means in the upper section of a passenger vehicle, said air cooling means being connected with a liquid cooling means, said liquid cooling means being adapted to hold ice, and liquid, the system having substantially equal air circulating means in the sphere of the space to be occupied by passengers and means to supply liquid. to the liquid cooling means.

13. In a system of cleaning, cooling and distributing air for passenger vehicles having two cooling units each having a liquid cooling means, and means to cool the air, a liquid supply system carried by the vehicle and connected to the cooling means, the cooling units being located at opposite ends of the vehicle and having fans for driving the air to the cooling means and into the vehicle, said fans driving their energy by means carried by the vehicle, the system having control means.

14. In a passenger vehicle, in combination a drinking water cooling device andan air conditioning device both associated with a common refrigeration system, said air conditioning device having means for conditioning and cooling the air and means attached to the air conditioning system for driving air through an air conveying system opening into the interior of the vehicle and a liquid supply system for furnishing liquid to theair conditioning means.

15. The combination in an air cooling compartment on a casing, a compressor, and a con denser within the casing having means to be cooled by water and having connecting means 7 connecting with a cooling means in the cooling compartment, said cooling compartment being integral with the casing and having a separating means between the cooling compartment and the condenser and compressor, means to convey air to the cooling means, to cool the air, and means to convey the air out of the cooling compartment.

16. The combination in an air cleaning and cooling system for passenger vehicles, having air cleaning and cooling means, a cooling means adapted to contain liquid and ice and having means to open and close the cooling means for the introduction of ice, an air cooling means in the upper section of the vehicle having pipe connections for containing liquid and connected with the first named cooling means, a fresh air intake in the vehicle, blowers deriving energy from the vehicle having control means, and means for driving fresh air to the cooling means and into the vehicle with means for supplying liquid to the cooling means.

17. The combination of an air cooling compartment and a casing; two separate coils in the compartment, pipe connections passing through the cooling compartment to the coils; a compressor and a condenser within the casing having means to be cooled by water, and said condenser having connecting means connected with one of the mentioned coils in the cooling compartment, said coil being an evaporator, there being a separating means between the cooling compartment and the condenser and compressor; means for furnishing air to the evaporator and to carry the air out of the cooling compartment, and means to control the air and the refrigerating unit.

18. In a device for cooling air for passenger vehicles, a cooling compartment adapted to hold ice and liquid; means for cooling the air in the upper section of the vehicle, the cooling compartment having pipe connections with the air cooling means for circulating liquid; a blower having a fresh air intake having air circulating means and means for bringing the air to be cooled in contact with the air cooling means, and means for controlling the volume of air with means for supplying liquid to the cooling compartment.

19. In a system for cooling air for passenger vehicles by liquid caused by the melting of ice, a cooling compartment adapted to receive liquid and ice, having liquid cooling means, an air conveying means attached to the vehicle bringing the air to be cooled in contact with the cooling means, and means to clean and deliver the cooled air to the space occupied by passengers with means of supplying liquid to the cooling compartment.

20. In a system of conditioning, cooling, and distributing air, and cooling drinking water for passenger vehicles, a liquid supply means carried by the vehicle associated with the system, means for conditioning and means for cooling the air, means for varying the amount of air conditioned, and means associated with the air cooling means for cooling drinking water, the system. having equal air circulating means in the sphere of the space to be occupied by the passengers.

21. In a system of conditioning, cooling, and distributing air, and cooling drinking water for passenger vehicles, a liquid supply means carried by the vehicle associated with the system, means for conditioning and means for cooling the air, and means associated with the air cooling means for cooling drinking water, the system having equal air circulating means in the sphere of the space to be occupied by the passengers.

CARTER F. HALL. 

